單項選擇題（） is not properly set thus causing either advanced or retarded firing.

A.A piston
B.A fuel injection pump
C.A feed water pump
D.A lube oil pump


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1.單項選擇題（） the supercharge pressure is, （） power an engine develops.

A.The higher；the more
B.Higher；more
C.Higher；little
D.The higher；the less

2.單項選擇題（） the cylinder will contain a great weight of air and will be capable of burning a great quantity of fuel.

A.At the beginning of the compression stroke
B.At the beginning of the suction stroke
C.At the end of the working stroke
D.At the end of the exhaust stroke

3.單項選擇題（） should not undertake any task which will interfere with the supervision duties relating to the main machinery and associated equipment.

A.The watch keeping personnel
B.The chief engineer
C.The person on a bunker barge
D.Any of the above

4.單項選擇題（） pistons have low inertia and high coefficient of thermal expansion.

A.Cast iron
B.Cast steel
C.Forged steel
D.Aluminum

5.單項選擇題（） of the A-frames there is a strong cast iron frame called the scavenging air box.

A.At the top
B.At the bottom
C.In the top
D.In the bottom